Are all decimals a rational number

Mathematics

2 answers:

ivanzaharov [21]3 years ago

5 0

No not all since for example 5.0 is in decimal form but is not a rational number

kow [346]3 years ago

3 0

Only if it's not a whole number by itself, like 3.0 or 8.0 but yeah pretty much

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198 is 33% of what number?<br> Please show work<br> Can Robtobey help me and others :) ...?

Ghella [55]

First, you have to convert 33% to decimals by dividing it to 100. And that would be 0.33.
Then you want to know the 100 percent of 198 because it's just a 33% part of a whole.
You will have to divide 198 by 33% or 0.33 to get the whole. So the answer would be 600.

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3 years ago

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Viktor [21]

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mrs_skeptik [129]

Answer:

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Step-by-step explanation:

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Arlecino [84]

Answer:

22.86% probability that the persons IQ is between 110 and 130

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 100, \sigma = 15$